SQL语句帮助User: Anonymous (jiangjy233@gmail.com)Created: 8/8/2025 15:34Updated: 8/12/2025 16:21Exported: 8/12/2025 17:13Link: https://chatgpt.com/c/6895a877-2e78-8326-ae88-64e92fbff2b2
Prompt:ddl语句是什么
Response:DDL 是 Data Definition Language（数据定义语言） 的缩写，它是 SQL（结构化查询语言）的一部分，用于 定义或修改数据库结构，比如：数据库、表、视图、索引、约束等。
🔧 常见的 DDL 语句包括：
语句
功能说明
CREATE
创建数据库对象（如表、数据库、视图等）
ALTER
修 ...
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